Peter smith



(No Model.)

- P. SMITH.

WATER HEATER AND GIRGULATOR. No. 251,741. f Patented Ja 3,1882.

WITNESSES g M INVENTOR fla /kw ATTORNEY n, PETERS. Phom-hlhagmpher. Washmglorm n c,

. UN TED STATES PATENT OFFICE.

PETER SMITH, OF DETROIT, MICHIGAN, ASSIGNOR TO HIMSELF, THOMAS A. BISSELL, AND JOHN G. MGLAUGHLIN, OF SAME PLACE.

WATER HEATER AND CIRCULATOR.

SPECIFICATION forming part of Letters Patent No. 251,741, dated -J'anuary 3, 1882. Application filed September 16I 1881. (No model.)

To all whom it may concern:

Be it known that I, PETER SMITH, of Detroit, county of Wayne, State of Michigan, have invented anew and useful Improvement in Water Heaters and Uirculators; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being bad tothe accompanying drawing, which forms a part of 1 this specification.

My invention consists of the combination of devices and appliances hereinafter described, and more particularly pointed out in the claim.

In the drawing the figure illustrates a central vertical section of a heater embodying my improvements.

In the use of steam fireengines it is customary to maintain, by an external or subsidiaryheater, the water in the boiler at or near the boiling-point, or even a little above that point, so that in case of a fire-alarm the fire on the engine is lighted, the engine disconnected from the subsidiary heater, and steam is up in a few moments.

The object of my invention is to make an improved heater for this purpose which shall produce and maintain the heat with a less expenditure of fuel than heretofore. It is also designedfor employment in railway passengercars, for warming the same by causing a circulation of hot water through suitable heatingpipes in the usual manner, and. as a heater in other locations.

To this end, A is an ordinary furnace, with a water-jacket, B, surrounding it. C is a coil of metallic pipe arranged in the interior of the furnace. D is a damper to regulate the draft, the smoke passing off through the smokestack E.

The operation of the device in connection with a steam fire-engineis as follows: The water from the engine-boiler passes into the heater located near the engine at the point f, circulates through the water-space, where it is heated to a considerable degree, thence passes out at g and into the metallic coil, where a final and very high degree of heat is attained before it passes again into the engine-boiler through the pipe h. By this arrangement a constant circulation of the water is maintained at a high degree of heat and with a small expenditure of fuel.

A heater embodying my improvements has been for some time in practical work ng operation in connection with a steam tire-engine, and has proved satisfactory to a remarkable degree, and has effected a very large saving of fuel over those devices that have preceded it.

It will be observed that the pipe or waterconduit leading from the engine-boiler or other source to be heated enters the water-jacket at or near its base, and that the conduit leading from thejacket starts from a point higher up, passes thenceinto the inner coil at its lower 6 extremity, and thence upward and out again to the exterior boiler or other source that is being heated. This construction is preferable, inasmuch as the water, when heated in the boiler, rises and flows therefore naturallyfrom the lower inlet-pipe out of the higher outletpipe, and the greater temperature in the coil increases the rapidity of its natural flow upward, so that a rapid circulation is maintained through the heater.

The damper D is perforated, so that when closed it does not entirely cut off the draft, but impedes the products of combustion sufficiently to break up the tendency to a central current, and thereby deflects the heat against the coil.

Of course one or more'coils maybe employed, though I prefer but one.

What I claim is A water heater and circulator consisting of an upright furnace with an inclosing waterjaoket, a conduit leading into the jacket from the outside of the furnace, and a. pipecoil arranged within the furnace, and having one terminal connected with the water-jacket and the 0 other leading directly to the outside of the furnace, and adapted for connecting with a waterconveying pipe, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

PETER SMITH. 

